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Extracellular Matrix Abnormalities in Cardiac Insulin Resistance as a Therapeutic Target of Chronic Heart Failure

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  • Full or part time
    Dr L Kang
    Prof C Lang
  • Application Deadline
    Applications accepted all year round

Project Description

Description: Diabetes and chronic heart failure (CHF) often coexist such that each condition may affect the other in terms of causation and outcome. This bidirectional interrelationship between CHF and diabetes also extend to insulin resistance. Insulin resistance and associated reductions in cardiac insulin signalling is emerging as a major factor for the development of CHF. The pathogenesis of insulin resistance in CHF is not fully understood. A growing body of evidence suggests a link between extracellular matrix (ECM) remodelling and insulin resistance. Preliminary data from Dr Li Kang’s research show that cardiac insulin resistance may be associated with increased deposition of ECM components, such as collagen III and collagen IV. Importantly, reduction of the ECM components has the potential of improving insulin sensitivity in the heart of insulin resistant mouse models. This project aims to test the hypothesis that reduction of heart ECM protein could rescue cardiac insulin resistance, which has the potential of improving cardiac function. The ECM not only provides structural support for tissues, but are ligands for cell membrane receptors. It has previously been shown that ECM-receptor signalling and endothelial dysfunction are associated with the development of skeletal muscle insulin resistance. Therefore, it is also hypothesized that ECM-receptor signalling and endothelial dysfunction could also contribute to cardiac insulin resistance and CHF. In this research, we plan to utilize the high fat-fed insulin resistant mouse model in the combination of genetic and pharmacological approaches to modulate cardiac ECM and its receptors, to extensively characterize the ECM profile of the heart (such as collagen III, IV, hyaluronan, matrix metalloproteinases etc.). The relationship between ECM remodelling, ECM-receptor signalling, and endothelial dysfunction in the heart with cardiac insulin sensitivity will provide important and novel insights into the role of the ECM in cardiac insulin resistance and CHF and ECM may well become a target for therapy in diabetic cardiovascular disease. This research project takes an interdisciplinary approach, which will be facilitated by Dr Kang’s expertise in in vivo insulin resistance physiology and Professor Lang, a leading expert in cardiology and clinical pharmacology with an interest in pathophysiology of cardiac metabolic disease.

To apply please send a cover letter, curriculum vitae and two references to: [Email Address Removed]

Funding Notes

Please note this is a self-funded PhD project

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